:root {
  color-scheme: light dark;

  --bg: #fbf7f0;
  --surface: #ffffff;
  --surface-2: #f4eee4;
  --border: #e2d8c8;
  --text: #241d15;
  --muted: #7a6d5c;
  --accent: #b4531d;
  --accent-soft: #f6e3d6;
  --good: #1f7a52;
  --good-soft: #dff2e8;
  --bad: #a52d2d;
  --bad-soft: #fadedd;
  --gold: #c08a1e;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(36, 29, 21, .06), 0 8px 24px rgba(36, 29, 21, .06);
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --gurmukhi: "Noto Sans Gurmukhi", "Nirmala UI", "Gurmukhi MN", "Raavi", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17130f;
    --surface: #211b16;
    --surface-2: #2b241d;
    --border: #3c3229;
    --text: #f2e9dd;
    --muted: #a2937f;
    --accent: #e8895a;
    --accent-soft: #3a271c;
    --good: #5bc08d;
    --good-soft: #17301f;
    --bad: #e8807c;
    --bad-soft: #331a1a;
    --gold: #e0b354;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

button, input, select { font: inherit; color: inherit; }
a { color: inherit; }

/* --- chrome ------------------------------------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; }
.brand-mark {
  font-family: var(--gurmukhi);
  background: var(--accent);
  color: #fff;
  width: 32px; height: 32px;
  border-radius: 9px;
  display: grid; place-items: center;
  font-size: 19px;
}
.brand-name { letter-spacing: -.02em; font-size: 18px; }

.topnav { display: flex; gap: 4px; flex-wrap: wrap; }
.topnav a {
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}
.topnav a:hover { background: var(--surface-2); color: var(--text); }
.topnav a.active { background: var(--accent-soft); color: var(--accent); }

.badge {
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 0 6px;
  font-size: 11px;
  margin-left: 2px;
}

.view { flex: 1; width: min(920px, 100%); margin: 0 auto; padding: 28px 20px 64px; }
.footer { padding: 18px 20px; text-align: center; color: var(--muted); font-size: 13px; }
.loading { color: var(--muted); padding: 40px 0; text-align: center; }

/* --- generic pieces ----------------------------------------------------- */

h1 { font-size: 26px; letter-spacing: -.02em; margin: 0 0 4px; }
h2 { font-size: 18px; margin: 0 0 2px; letter-spacing: -.01em; }
.sub { color: var(--muted); margin: 0 0 24px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  padding: 10px 18px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .06s ease, background .15s ease;
}
.btn:hover:not(:disabled) { background: var(--surface-2); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); background: var(--accent); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.pa { font-family: var(--gurmukhi); }
.muted { color: var(--muted); }
.tiny { font-size: 13px; }

/* --- course home -------------------------------------------------------- */

.hero {
  display: flex; gap: 20px; align-items: center; justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 26px;
}
.hero-stats { display: flex; gap: 22px; }
.stat-value { font-size: 24px; font-weight: 700; line-height: 1.1; }
.stat-label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }

.progressbar { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; border: 1px solid var(--border); }
.progressbar > i { display: block; height: 100%; background: var(--accent); }

.unit { margin-bottom: 22px; }
.unit-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.unit-num {
  font-size: 12px; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); border-radius: 999px; padding: 2px 9px;
}
.unit-count { margin-left: auto; font-size: 13px; color: var(--muted); }

.lesson-list { display: grid; gap: 10px; }
.lesson {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  text-align: left;
  width: 100%;
  box-shadow: var(--shadow);
}
.lesson:hover:not(.locked) { border-color: var(--accent); }
.lesson.locked { opacity: .55; cursor: not-allowed; box-shadow: none; }
.lesson-dot {
  width: 30px; height: 30px; flex: none;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--surface-2);
  font-size: 14px;
  border: 1px solid var(--border);
}
.lesson.passed .lesson-dot { background: var(--good-soft); color: var(--good); border-color: var(--good); }
.lesson.available .lesson-dot, .lesson.started .lesson-dot { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.lesson-body { flex: 1; min-width: 0; }
.lesson-title { font-weight: 600; }
.lesson-goal { font-size: 13px; color: var(--muted); }
.lesson-meta { font-size: 12px; color: var(--muted); flex: none; text-align: right; }

/* --- lesson: teach ------------------------------------------------------ */

.stepper { display: flex; gap: 6px; align-items: center; margin-bottom: 18px; font-size: 13px; color: var(--muted); }
.step { padding: 4px 10px; border-radius: 999px; background: var(--surface-2); }
.step.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.flashcard {
  text-align: center;
  padding: 40px 24px;
  display: grid;
  gap: 8px;
  min-height: 230px;
  align-content: center;
}
.flash-pa { font-family: var(--gurmukhi); font-size: 40px; line-height: 1.35; }
.flash-roman { font-size: 20px; color: var(--accent); font-weight: 600; }
.flash-en { font-size: 18px; }
.flash-note { color: var(--muted); font-size: 14px; max-width: 46ch; margin: 6px auto 0; }
.flash-say {
  font-size: 14px;
  color: var(--gold);
  background: var(--surface-2);
  border-radius: 8px;
  padding: 6px 12px;
  max-width: 46ch;
  margin: 4px auto 0;
}

.notes { display: grid; gap: 8px; margin: 18px 0; }
.note {
  background: var(--surface-2);
  border-left: 3px solid var(--gold);
  border-radius: 0 10px 10px 0;
  padding: 10px 14px;
  font-size: 14px;
}

.dialogue { display: grid; gap: 10px; margin: 14px 0; }
.turn { display: grid; gap: 2px; padding: 12px 14px; background: var(--surface-2); border-radius: 12px; }
.turn.you { background: var(--accent-soft); }
.turn-who { font-size: 12px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.turn-pa { font-family: var(--gurmukhi); font-size: 20px; }
.turn-roman { color: var(--accent); font-size: 14px; }
.turn-en { font-size: 14px; color: var(--muted); }

.speak-btn {
  border: 1px solid var(--border); background: var(--surface);
  border-radius: 50%; width: 38px; height: 38px; flex: none;
  cursor: pointer; display: grid; place-items: center; font-size: 16px;
}
.speak-btn:hover { background: var(--surface-2); }

/* --- lesson: practice --------------------------------------------------- */

.drill-top { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.drill-top .progressbar { flex: 1; }

.prompt-block { text-align: center; margin: 10px 0 22px; }
.instruction { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .07em; margin-bottom: 12px; }
.prompt-main { font-size: 30px; line-height: 1.35; }
.prompt-main.pa { font-family: var(--gurmukhi); }
.prompt-sub { color: var(--accent); font-size: 17px; font-weight: 600; }

.choices { display: grid; gap: 10px; grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .choices { grid-template-columns: 1fr; } }
.choice {
  padding: 14px 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  cursor: pointer;
  text-align: left;
  display: grid;
  gap: 2px;
}
.choice:hover:not(:disabled) { border-color: var(--accent); }
.choice .c-main { font-size: 17px; }
.choice .c-main.pa { font-family: var(--gurmukhi); font-size: 22px; }
.choice .c-sub { font-size: 13px; color: var(--accent); }
.choice.correct { background: var(--good-soft); border-color: var(--good); }
.choice.wrong { background: var(--bad-soft); border-color: var(--bad); }

.type-input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 18px;
}
.type-input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.tiles { display: flex; flex-wrap: wrap; gap: 8px; }
.tile {
  padding: 9px 14px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); cursor: pointer; font-size: 16px;
}
.tile:hover { border-color: var(--accent); }
.tile.used { opacity: .3; pointer-events: none; }
.assembly {
  min-height: 56px; border: 1px dashed var(--border); border-radius: 12px;
  padding: 9px; display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px;
  background: var(--surface-2);
}

.feedback { margin-top: 18px; padding: 14px 16px; border-radius: 12px; display: grid; gap: 4px; }
.feedback.ok { background: var(--good-soft); border: 1px solid var(--good); }
.feedback.no { background: var(--bad-soft); border: 1px solid var(--bad); }
.feedback-head { font-weight: 700; }
.feedback .pa { font-size: 20px; }

/* --- results ------------------------------------------------------------ */

.result { text-align: center; display: grid; gap: 10px; padding: 34px 20px; }
.result-score { font-size: 52px; font-weight: 800; line-height: 1; }
.result.pass .result-score { color: var(--good); }
.result.fail .result-score { color: var(--accent); }

.missed { display: grid; gap: 8px; margin-top: 12px; text-align: left; }
.missed-row { display: flex; gap: 12px; align-items: baseline; padding: 8px 12px; background: var(--surface-2); border-radius: 10px; }

/* --- progress ----------------------------------------------------------- */

.grid-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 22px; }
.heat { display: flex; gap: 3px; flex-wrap: wrap; margin-top: 6px; }
.heat i { width: 13px; height: 13px; border-radius: 3px; background: var(--surface-2); border: 1px solid var(--border); }
.heat i.l1 { background: var(--accent-soft); }
.heat i.l2 { background: var(--accent); opacity: .6; }
.heat i.l3 { background: var(--accent); }

.field { display: grid; gap: 6px; margin-bottom: 16px; max-width: 380px; }
.field label { font-weight: 600; font-size: 14px; }
.field select, .field input {
  padding: 9px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface);
}

.empty { text-align: center; color: var(--muted); padding: 40px 20px; }

.unit-num.optional { color: var(--gold); background: transparent; border: 1px solid var(--gold); }

/* --- recording studio --------------------------------------------------- */

.studio-booth { margin-bottom: 18px; }
.booth-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.booth-text {
  font-family: var(--gurmukhi);
  font-size: 42px;
  line-height: 1.4;
  text-align: center;
  margin: 6px 0;
}
.booth-roman { text-align: center; font-size: 20px; color: var(--accent); font-weight: 600; }
.booth-en { text-align: center; font-size: 16px; color: var(--muted); margin-bottom: 18px; }
.booth-controls { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }

.btn-recording {
  background: var(--bad);
  border-color: var(--bad);
  color: #fff;
  animation: pulse 1.4s ease-in-out infinite;
}
.btn-recording:hover:not(:disabled) { background: var(--bad); filter: brightness(1.08); }
@keyframes pulse { 50% { opacity: .72; } }

.booth-status {
  margin-top: 14px;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
}
.booth-status.live { color: var(--bad); font-weight: 600; }
.rec-dot {
  display: inline-block; width: 9px; height: 9px; border-radius: 50%;
  background: var(--bad); margin-right: 6px;
  animation: pulse 1.4s ease-in-out infinite;
}

.studio-error {
  background: var(--bad-soft);
  border: 1px solid var(--bad);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 14px;
}

kbd {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
}

.filter-tabs { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.filter-tab {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--muted);
}
.filter-tab:hover { background: var(--surface-2); }
.filter-tab.on { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

.studio-list { display: grid; gap: 6px; }
.studio-row {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  width: 100%;
}
.studio-row:hover { border-color: var(--accent); }
.studio-row.on { border-color: var(--accent); background: var(--accent-soft); }
.studio-row.done .row-dot { color: var(--good); }
.row-dot { width: 16px; flex: none; text-align: center; color: var(--muted); font-weight: 700; }
.row-body { flex: 1; min-width: 0; display: grid; }
.row-pa { font-size: 19px; line-height: 1.4; }
.row-sub { font-size: 12px; color: var(--muted); }

.chip-done {
  font-size: 11px; font-weight: 700; letter-spacing: .03em;
  color: var(--good); background: var(--good-soft);
  border: 1px solid var(--good); border-radius: 999px; padding: 1px 9px;
}